---
title: "esx.problem.vmfs.heartbeat.unrecoverable"
description: "This event indicates a permanent connectivity loss to the volume. This alert can occur after a lengthy loss of connectivity from the storage, possibly caused if the heartbeat slot used by the host for the volume is repeatedly cleared and claimed..."
canonical: "https://helpcenter.veeam.com/docs/mp/kb/h.esx.problem.vmfs.heartbeat.unrecoverable.html"
breadcrumb: "Veeam MP for VMware Online Knowledge Base > Event-Based Rules > vSphere Host Storage Error > esx.problem.vmfs.heartbeat.unrecoverable"
dateModified: "2026-09-10"
---

# esx.problem.vmfs.heartbeat.unrecoverable

## Summary

This event indicates a permanent connectivity loss to the volume.

## Causes

This alert can occur after a lengthy loss of connectivity from the storage, possibly caused if the heartbeat slot used by the host for the volume is repeatedly cleared and claimed by another host.

All queued I/O to the volume is discarded and any virtual machines should be shut down.

## Resolutions

Reboot the affected host, after first vMotioning running VMs to an alternative host.

Check for storage connectivity issues.

## External

Refer to the [VMware Online Documentation](https://techdocs.broadcom.com/) for more information on vCenter event messages and possible solutions.